Roof jack



Nov. 30, 1954 K. s. JENSON ETI'AL ROOF JACK Filed Oct. 23 1951 INVENTORS. ffe/mefi S. Ji /250 ZMZZZZS )2. 7 665% ROOF JACK Kenneth S. Jensen and Willis NrNelson, Wisconsin Rapids, Wis., assignors to Preway Inc., Wisconsin Rapids, Wis., a corporation of Wisconsin Application October 23, 1951, Serial No. 252,630 3 Claims. (or. 98-46 This invention relates to a roof jack designed for application to an inclined roof. It incorporates in its structure a flashing-collar unit which may be affixed to a roof having a pitch within the normal range of building structures. ing whereon a smoke pipe may be maintained vertically with full weather protection thereto at the point where it emerges through the roof.

A roof jack of this kind may be produced economically from sheet metal with but few parts. When installed and properly adjusted, a lock is applied to make the adjustment permanent. Thereafter the smoke pipe Will be supported vertically in spaced relation to the roof and also to the ceiling therebelow, but with ample provision for ventilation at these points.

A suggestive embodiment of this invention is illustrated in the accompanying drawing wherein- Figure 1,is a perspective view of the roof jack as it appears when operatively installed, portions of the roof jack and its associated roof and'ceiling being broken awayto better exhibit the construction;

Fig. 2 is a central vertical section through the installed roof jack and surrounding roof structure; and p 7 Fig. 3 is a transverse section, taken on line 3-3 of Fig. 2.

In the drawing a conventional roof R is shown of normal pitch spaced from a horizontal ceiling 6 therebelow. The supports for the roof and ceiling are unimportant to this invention, consequently are not illustrated. Sufiice to say that an opening is formed through the ceiling in register with a similar opening in the roof thereabove for the reception therethrough of a vertical smoke pipe P. This pipe occupies a more or less central position within the two openings so as to remain spaced from the ceiling and roof of the building structure.

A pipe shield S comprising upper and lower sections 10 and 11 surrounds the smoke pipe between the ceiling 6 and the roof R. These sections are telescopically interfittted so as to be extensible or contractible according to the distance between the ceiling and the roof at the point of installation. The lower shield section 11 is formed with spaced rows of circumferentially spaced tongues 14 and 15, respectively. adapted to embrace the top and bottom sides of the ceiling to fix the position of the lower section relative thereto. This lower section of the shield is also provided along its bottom with an outturned flange 16 which is extended continuously through 360 to produce a finished trim at this point.

The upper shield section 10 is cut at the time of installation to correspond to the pitch of the roof. Slits are then cut so that a series of tabs 10a and 1% are formed around its perimeter. The tabs 10b stop against the bottom side of the roof and the tabs 10a are bent down against the top side of 10 in place.

An escutcheon 18 which is fitted into the lower sec tion of the shield is provided with ports 19 which are adapted to be closed or opened in varying degree by an annular damper plate 20 that .is mounted for rotation thereon. A finger piece 21 which depends from this damper plate passes through an arcuate slot in the escutcheon to provide a ready means for operating the damper to a desired rotative position.

The smoke pipe P in its lower end portion is opera tively connected to a flue pipe 23 leading from a space heater or heating plant within the building. At a point close to its upper end the flue pipe 23 is engaged by the In such an assembly the collar provides a mount the roof to hold the shield bonnet assembly is escutcheon 18, the. latter thereby aflording lateral support to the flue pipe 'andfto the v r tion therewith. In the upper portion of the smoke pipe a sleeve 24 is closely fitted thereupon to constitute an extension therefor. Bracket arms 25 upstand from the upper end of the sleeve to support a bonnet .26. The vertical position of the sleeve-bonnet-smoke plpe assem bly is fixed by means shortly to be described.

A collar C is formed'to receivethe smoke pipe P therethrough. This collar is elongated with opposite side walls 28 that are substantially flat. A base for the collar is provided by a flashing plate 30 which is lockseame'd thereto and extended therefrom to overlie the adjacent portions of theroof to establish connection therewith. The collar supports: at its top an elongated insect screen 31 whose sides are downturned at 32 to partially lap the elongated side Walls of the collar C. The screen which ceive the smoke pipe therethrough is free to shift its position longitudinally upon the collar, as required by the latters inclined position upon the roof where installaa weather-tight tion is made.

A hood H is carried to whose bottom end portion it is lock-seamed at 35. This hood is formed with opposite arcuate end portions 36 and 37 interconnected by elongated vertical walls 38.

which lie just to the outside of the flat elongatedwalls pin traverses the hood, collar; establish therebetween an adjustable. The vertical position of the sleeve- 28 of the collar.. A and smoke pipe to pivotal connection.

fixed, and the same is true of the smoke pipe P.

When the roof jack is in process of being installed, the collar-flashing assembly is first secured in place, the an gle of its inclination being determined by that of the roof. The smoke pipe P having the sleeve 24 and the hood H secured thereto is manipulated to a vertical position, passed through the collar C andthen connected to the flue pipe 23. The pin 40 is then passed through the hood, collar and smoke pipe and the hood is secured to the collar by lock straps or wires 41 which are tied to opposite ends of the hood H at its base and to the proximate end of the collar C near its top. Each strap extends between an end of the hood and the proximate end of the collar. ese straps or wires may conveniently be made of metal and slots 41:! for their reception are preformed in the hood and collar to facilitate their application. The strap ends are inserted through the slots and then bent around them. When done, the hood ends will be extended beyond the ends of the collar C and below its upper portion to provide adequate weather protection therefor.

It will be noted that one arcuate end portion of the hood is somewhat larger than the other so that the interconnecting walls 38 are non-symmetrical. In the construction illustrated, this inclination is not parallel with the roof, but its divergency, such as it is, is unimportant since there is suflicient overhang at opposite ends of the hood to afford ample weather protection to the collar and interior of the pipe shield.

An important feature of this roof jack is its adaptability to roofs of varying pitch. No account need be taken of the exact inclination in any case since the hood-smoke pipe assembly is readily adjustable to meet varying conditions. As a result, a single model of hoodcollar assembly will sufiice for installations where the roof pitch conditions are widely divergent.

We claim:

1. For mounting upon an inclined roof having an opening through which is extended a vertical, cylindrical smoke pipe, a roof jack comprising an elongated collar having a flashing plate secured to the lower end of the collar and extending over the opening in the roof fixedly secured to the roof, said collar upstanding from the base in surrounding relation to the smoke pipe and having flat sides and rounded ends, a cylindrical sleeve surrounding the smoke pipe in its upper portion, an inverted hollow hood secured to the sleeve at a point above the collar and depending from the sleeve and formed with opposite flat sides and arcuate ends lapping opposite flat sides and ends of the collar, a transversely extending pin extending through the hood, collar, and smoke pipe Patented Nov. 30, 1954' smoke pipe P in connec is centrally apertured to reby the smoke pipe extension 24 mounting the collar for pivotal movement with respect to the hood n smok r p where y to t ee th colla for inc lined positioning on the roof in accordance with the pitch thereof when the [smoke pipe is disposed in a e ti ,osi on, and emovable straps f st ed to th PPQ P ge of the co lar nd ex end ng downwa d y tween the hoodand the collar and adapted to be. secured to {the lower edge'of the hood when the hood and smoke pipe are adjusted to the pitch of the roof to rnaintain the smoke pipe in vertical position, said straps be ng located i i t e s e e a ea provided by the hood;

2! For nt n upo an in lined r o sp sed a v a ceiling and having an opening through which is extended a vertical smoke pipe, a roof jack comprising a shield for 'the portion oi the smoke pipe between the roof and ceiling including a pair of telescoping cylindrical e o secured to the roof and ceilingrespe tivdy, an elongated eollarhavinga flashingplate extending over the ope ing n the roo fixedl secur d to the roof, said collar upstanding from the base in snrrounding relation to the smoke pipe and having flat sides and rounded .ends, the opposite long flat sides of the collar ,being disposed in the e on o e inc ination o th ro f, a h d d 'fam nd a fi ed y carr ed by t e smoke p at a point above the collar and formed with opposite elongated sides lapping the opposite elongated flat sides of the collar, the ends of the hood being curved downa d extend o d h co lar ends .in l pp r lation thereto but spaced therefrom sufiiciently to be clear thereof in various adjusted positions of the hood relative to the collar, 2}. pin extending between the collar, hood and smoke pipe providing a ivotal connection therebetween whereby to free the col ar for inclined positioning Q 1 the roof in accordance with the pitch thereof when the smoke pipe is disposed in a vertical position, and removable strap means adapted to be extended -be. tween and secured to the ends of the collar and the ends of the'hood within the confines of the hood for fixedly l k g h s t the col a w e the hood i 'a iu t to the'pitch of the roof wheneby to maintain the smoke pipe' invertical position.

*3. Formounting upon an inclined roof having an penin r h hi is x ended a rti sm k Pip 0 Number 4 a roof jack comprising an elongated collar having a base fixedly secured to the roof and flat sides and ends up.- standing therefrom in surrounding relation to the smoke pipe, an inverted hollow hood fitted around and fixedly carried by the smoke pipe and formed with opposite elongated sides lapping the opposite elongated fiat sides of the collar, a pin extending through the hood, collar and smoke pipe establishing a pivotal connection between the hood and the collar to ,free the collar for inclined positioning on the roof in accordance with the pitch thereof when the smoke pipe is disposed in a vertical position, a screen panel extended over the top of the collar and having means defining a vertical opening for reception of the smoke pipe, said screen panel being longer than the length of the sides of the collar to enable adjustment of the screen panel on the collar without uncovering the collar, downturned sides on the screen engaging the sides of the collar to provide a guide for the screen panel to permit sliding movement thereof only in a direction lengthwise of the collar whereby to be selfadjusting according to the rotative position of the col? lar relative to the smoke pipe, and straps extending between and secured to the hood and collar fixedly lock.- ing hehood to the collar whereby to maintain the smoke pipe in vertical position.

References Cited in the file of this patent UNITED STATES PATENTS Name Date 314,309 457.2 33 533,454 700,762 758,510 879,987

Sufiron Aug. 4, 1891 e, Feb. 5. 1895 May 27, 19.02 Apr 26, 1904 Feb. 25,. 1908 July 25, 191.6 Nov, 27, 1917 Ian. 20, 1920 SepL 26', 1922 June 8, 192d Feb. 24, 1942 Goodwin Dickinsol Maranville Atkin Mar. 24, 1885 

